Developer Preview Release Soon

Hey everyone, we're about to release a small update to the developer preview with a few fixes. Let us know if you see any issues!

Bug Fixes:
* Fixed a number of threading issues that may have been causing sporadic crashes.
* Fixed a crash on switching puzzles to a different size.
* Fixed a hotkey collision.
* Potential fix for previously reported 64-bit mac issues (64-bit release to come at a later date).
* Fixed the window name on Mac to correctly read Foldit instead of game_dynamic.
* Some small updates to the loading tips.